Commit 1ba56fb4 authored Nov 13, 2012 by Alexander Duyck Committed by David S. Miller Nov 13, 2012

vxlan: Update hard_header_len based on lowerdev when instantiating VXLAN

In the event of a VXLAN device being linked to a device that has a
hard_header_len greater than that of standard ethernet we could end up with
the hard_header_len not being large enough for outgoing frames. In order to
prevent this we should update the length when a lowerdev is provided.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent eb5ce439

drivers/net/vxlan.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1102,6 +1102,10 @@ static int vxlan_newlink(struct net net, struct net_device dev,

		if (!tb[IFLA_MTU])
		dev->mtu = lowerdev->mtu - VXLAN_HEADROOM;

		/* update header length based on lower device */
		dev->hard_header_len = lowerdev->hard_header_len +
		VXLAN_HEADROOM;
		}

		if (data[IFLA_VXLAN_TOS])